Sealey polyethylene barrel bunds sealey drp12 manufactured from polyethylene these bunds from sealey are ideal for storing aggressive chemicals and are fully compliant with the control of pollution oil storage regulations 2001 anyone storing oil in containers greater than 200 litres is subject to the regulations any tank container or drum must be bunded the bund must have a capacity of not less than 110 of the largest or 25 of their total aggregate storage capacity whichever is the